Underframe for cars.



A. K. READING.

UNDERFRAME FOR CARS.

APPLICATION FILED MN. 12. I918.

Patented June 25, 1918;-

2 SHEETS-SHEET l.

A. K. READING.

UNDERFRAIYIE FOR CARS.

APPLICATION, FILED IAN. 12. 191B.

' Patented J une 25, 1918.

2 SHEETSSHEET 2.

' IIIII II, I I II I A MUM. VA II H Li mm 4 ARTHUR K. lBtlEflDING, F DAVENPORT, IOWA, ASSIGNOR TO THE BETTJENDORF COM- P, 015 BETTENJDORF, IOWA, A CORPORATION OF IOWA.

UNDERFRAMJE FOR CARS.

manner,

Specification of Letters Patent. Patented June 25, 11%,,

Application filed January 1a, 1918. Serial No. ail lea.

To all whom it may concern.-

Be. it known that l, ARTHUR K. REA ING,

v a citizen of the United States of America,

and resident of Davenport, Scott county,

llowa, have invented a certain new and useful Improvement in Underframes for Cars, of which the following is a specification.-

My invention relates to an improvement in underframes for cars, and has for its object the provision of an improved metallic underfrarne, and relates especially to the provision of an improved connection between the draft sills and the center sills whereby a very effective structure is obtained, capable of receiving and resisting all thrusts and strains imparted to the same.

My inventionwill be more readily understood by having reference to the accompany-- ing drawings, in which I have illustrated one specific embodiment of my invention, and in which- Figure 1 is a plan view of one end of a metallic under-frame embodying the features of my invention.

Fig.2 is an enlarged sectional view taken on the line 2-2 of Fig. 1, looking in the direction of the arrows the outside elevation of the draft sill being shown, however.

tit

Fig. 3 isan enlarged plan view of a portion of the structure of Fig. 1, with the top flange of the center sill and draft .sill removed, in order to more clearly show the connection between the draft sill and the center sill.

Fig. 4 is a sectional view taken on the line 4-4; of Fig. 3. p

Referring to the drawings, there is shown in Fig. 1 thereof, one end of a metallic underframe comprising the usual side sills 6, 6, and the end sill 7, together with atbody bolster 8 of any well known form. Terminating adjacent the body bolster 8, and extending longitudinally of the underframe, ll provide a double center sill consisting of two T-beams 9, 9. Passing through these I I- beams, which constitute the center sill, are a series of transoms. 10, one of which is indicated in Fig. 1. Extending between the ends of the center sills 9, 9, and the end sill 7, are a pair of draft sills 11, 11, each of which consists of a metal beam of lE-shapev construction, but having addition a central strengthening flange 12. These two draft I sills are suitably spaced apart to provide space for the usual draft rigging, and at their inner ends are bifurcated so that they may be slipped over the ends of the l-beams 9, which constitute the center sills, as clearly shown in Fig. 4:. In order'to permit these.

draft sills and center sill to be connected in fit) this manner, the bifurcated portion of the 4 draft sill is not as high as the remaining portion, so that the. top flange will pass beneath the top flange of the T-beam 9, as clearly shown in Fig. 4. The lower flange of the draft sill likewise passes above the lower flange of the I-beains 9, the respective flanges being securely riveted together. With this construction, a practically continuous upper and lower flange is provided, extending the full length of the draft sills and center sill, as clearly shown in Fig. 2. The vertical webs of the center sill 9, and the vertical webs of the bifurcated end portions of the draft sills are'likewise securely riveted together. By the employment of the bifurcated draft sill construction, the rivets are more efl'ective, as in prior constructions in which the draft sills were not bifurcated,

- difliculty was experienced in the shearing of the rivets. With the bifurcated construction, however, each rivet has two surfaces for resisting the shearing stress between the two members, and thus each rivetis enabled to resist twice as great a shearing stress as in the old single construction. A much stronger construction is, therefore, obtained with the employment of-fewer rivets.

The draft sills are provided with a cutaway portion to permit their passing over the body bolster, and the central flange 12 is extended, as indicated at 13, and is riveted to the upper surface of the body bolster. A plate or cap 14 is secured to the lower part of the draft sill and extends beneath the body bolster, as clearly shown in Fig. 2. This plate is riveted to the draft sills on opposite sides of the bolster, and thus forms a solid unitary structure, and one of great strength. I

While ll have illustrated and described one specific embodiment of my invention, and have'shown the same specifically in connection with a double center sill, consisting of two metallic beams, it will be understood that I do not wish to be limited to such en .act construction, as, for example, a single rte other changes and modifications might also be made without departing from my invention.

What I claim as my invention is:

1. In car construction, an underframe including a center sill consisting of a metallic I-beam, and a draft sill consisting of a 'metallic I-beam having a bifurcated end portion adapted to engage with opposite sides of the central web of the end of said center sill.

2. In car construction, an underframe Y comprising body bolsters, a center sill consisting of a metallic I-beam terminating being of a metallic I-beam having a bifurcated web located tween the bolsters, and a draft sill consistend portion adapted to slip over and engage opposite sides of the central web of 20 the end of said center sill.

3. In car construction, an underframe comprising body bolsters, a center sill terminating between the-bolsters, said center sill comprising a pair of metallic I-beams,

and a pair of'draft sills comprising metallic beams connecting said bolsters to the end sills, each of said draft sills being provided with a bifurcated portion adapted to ,slip over the ends 'of the correspondingl beams constituting the center sill and being securely riveted to the central web of the said I-beams.

4. In car construction, an underframe including a center sill consisting of a metallic beam having a vertical web, a draft sill consisting of a metallic beam having a vertical in substantial alinement with the web, of the center sill, the rear end of said draft sill-web being bifurcated to embrace the forward end of said center sill web and being securely riveted thereto.

cluding a center sill consisting of a metallic beam having a vertical web, a draft sill consisting of a metallic beam having a vertical web located in substantial alinement with the web of the center sill, the vertical web of one of said beams being bifurcated at its end" so as to embrace the end of the vertical web of the other of said beams, and the two inter-engaging ends being securely riveted together.

. 7. In carconstruction, an underframe in- V eluding a center sill consisting of; a metallic beam having a vertical web and a top flange, a draft sill consisting of a metallic beam having a vertical web located in substantial alinement with the web of said center sill, and having a top flange in substantial alinement with the top flange of said center sill, the vertical web of one of said beams being bifurcated at its end so as to embrace the end of the vertical web of the other of said beams, the two inter-engaging ends being securely riveted together.

Signed by me at Davenport, Iowa, 4th day of January 1918.

ARTHUR K. READING.

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